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Upgrading software
Upgrading software includes upgrading the BootWare and system software. Each time the device is
powered on, it runs the BootWare image to initialize hardware and display hardware information and
then runs the system software image (called the "boot file" in software code). Then, you can access the
software features, as shown in
Figure 1
System startup process
Software upgrade methods
You can use one of the following methods to upgrade system software:
Upgrading method
Software types
Remarks
Upgrading from the CLI:
Reboot approach
•
BootWare image
•
System software
image (excluding
patches)
You must reboot the entire device to complete the
upgrade. This approach causes service interruption.
Hotfix approach
System software image
Hotfixes repair software defects without requiring a
reboot or causing service interruption.
Hotfixes do not add new features to system software
images.
Start
BootWare runs
Press
Ctrl+B
promptly?
System software
image runs
Enter the BootWare
menu to upgrade
BootWare or system
software
Yes
No
Select the
Reboot option to
reboot the device
System starts up
and CLI appears
End